Door hinge



Sept. 22, 1931. F. KREINER DOOR HINGE Filed June 4, 1930 I /h venfor': Ared hc i Patented Sept. 1931 mm, o

' DOOR HINGE Application fled June 4, Serial Io.

This invention relates to combined door hinges and checks of the typehaving a closing spring and braking means comprising a fluid containerassociated with one of the [leaves of the bin connected by a piston rodto one end of the closing spring.

One object of the present invention is to provide a door hin and checkhavin means 10 for enabling the raking actionto' rendered ineffectiveduri the last part of the closing motion, so that uringthis art of theclosing motion, the door will on y be subject to the action of thespring. B this means even large doors will be close with certainty, evenwhen under the'pressure of wind.

Another object of the invention is to provide a door hinge and check inwhich the braking means can also be adjusted so as to be effectivealmost up to the end of the closing motion, so that the door ma be madeto close gently, as is desirable in .t 0 case of single house doors, sothat the same door hinge and check can be used for doors which aredifficult to close as well as easy to,close, independently ofthe amountby which the closing spring is stressed.

In the accompanying drawings a constructional example of the inventionis shown,

Figure 1 being an elevation of the selfclosing door hinge. Fig. 2alongitudinal section, and Figs. 3 to 7 cross-section through the doorhinge on lines AA, BB, (BC, DD, EE, of Figure 2.

Referring to the drawings, the bin is provided with two leaves 1, 2,each ofw ich has an integral knuckle 3, 4, respectively, formed in knownmanner by rolling or curling. The lower end of the knuckle 4 is closed ba solid plug 5, the closure being rendere pressure-tight by means of asealing ring 6. A piston 7 is slidabl arranged inside the knuckle 4,said piston aving two opposite-handed helical slots 8, the upper ends ofwhich mer horizontally extending slots 8a (Fig. 7). In the lower end ofthe pistonis ball valve 11 which is arranged so as to open outwardly andis held ge and a piston operatively 459,132, and in emmi Inc 1:, 1029.

a retaining spring 10. When the piston is in its bottom posit1on, theend of a screw 12 which is screwed into the plug comes into contact withthe spring 10. The screw 12 has an adjusting spindle 13 ex- 5 tendingthrough the plug 5 to the outside and provided with a knurled head 14,so as to enable the screw 12 to be turned to protrude into the space 15of the cylinder below the piston by an adjustable amount. By this 5means the moment when the screw 12 will come into contact with the sprin10 of the ball valve canbe varied. In order to prevent any possibilityof braking fluid escapi-ng between the spindle 13 and the hole in theplug 5 through which the s indle is passed, a gland 16 is provided in te end of the lug 5. The upper'end of the hinge knuc e 4 is closed by anintermediate piece comprising-two screw-threaded portions 18 18a oneither side of a central rtion 17 o in position by larger diameterhaving radial oles 17' for engagement by a s anner wrench. The portion18 is screwed into the knuckle 4, the joint being sealed by means of apacking" ring 19. The other screw threaded portion 18a. of theintermediate piece is screwed into a hollow cylindrical member 20 whichextends into the knuckle 3, so as to be a loose fit therein. The portion18a of the intermeso diate piece has an extensiin 21 with a slot 22therein and the intermediate piece has a hole 23 through which extends apiston rod 24. The lower end 24a of the piston rod 24 is of largerdiameter and has a cross-bar 25 inas tegral therewith, the ends of saidcross-bar engaging in the slots 8, 8a of thepiston 7. The piston 7 isprevented from being turned by the piston rod 24 by means of twolongitudinal ribs 26 on the inside wall of the 00 knuckle 4 (Fig. 5),said ribs being-in sliding enga ment with guide grooves in the wall of te piston. Escape of the braking fluid through the hole 23 in theintermediate piece 17, 18, 18a is prevented by a packing gland 27. 4

The upper part 28 ofthe piston rod 24 is of square section and projectsbeyond the u per end of the knuckle 3, which latter is closed by a plug29 having an eight-cornered hole 29a (Fig. 6) through which the part 28of the piston rod is passed. Two diametrically opposed' projections 30on the plutgl 29 (Figs. 1 and 6) engitge in slots .31 in e upper end ofthe knuc e 3, the plug 29 being secured in position bfy a nut 32 screwedon to the upper end the piston rod, which is screw-threaded for thispur- 7 pose. A helical spring 33 surrounds the rod m 24, the lower endof said spring engaging in the slot 22 in the extension 21 of themtermediate piece 17, while the upper end engages in a hole 33a in apart 34 of a stepped member 35.

The upper part 35a of the member 35 is hexagonal and extends into acorresponding recess 36 in a securing ring 37 (Figs. 2 and which isinserted in the knuckle 3 and prevented from turning by two projectlons38 which engage in the slots 31 in the knuckle 3. The member 35 is alsoprovided with holes- 356 for a spanner wrench, the knuckle 3 and thepivot being slotted at 39 (Flgs. 1 and 4) to enable access to-beobtalned to the holes 356.

The door hinge and check operates as follows:

The leaf 2 is mortised into the door post and the leaf 1 into the door.On the door being opened and the leaf 1 being turned on [the member 20relatively to the fixed intermediate piece 17, 18, 18a and the leaf 2,the knuckle 3, by means of the projections (Figures 1 and 6) will turnthe plug 29 round with it. By means of the projection 38, the knucklewill turn the ring 37, the recess 36 of which embraces thehexagonal parta of the member 35, thereby turning the latter and applying a torque tothe spring 33, the lower end of which is prevented from turning bengagement with the art 21 of the fixe intermediate piece 18 w ereby thespring is stressed. The rod 24, the squarepart-28 of which is engaged asby the flug 29 turns, together with the latter. I the angular positionof the crossbar 25 is such that the cross-bar is opposite the entranceto the helical slots 8 (Fig. 7), the cross-bar will travel in the slots8 and I. move the: iston 7 upwards along the ribs-26. The oil within thepiston 7 and that inthe space above the piston 7 in the knuckle 4 will,thereby, be forced through the ball valve 11 into the space 15 below theiston ll 7,'the ball su ported on the sp 10 in forced downv dardly. Onthe d db l being r5 leased, the spring 33 will relax, that 15 to say itwill turn the member 35 back again to its initial position and thehexagonal head 00 350 will turn the ring 37 round with it, the

projections 38 will transmit the rotary motion to the knuckle 3 and thusto the door. At the same time, the plug 29 will turn back with the rod24 and the bar 25 will force the 68 piston 7 downwards again. The valve11 is so constructed-that it oflersmoreresistance to the return flow ofthe oil into the ace 40 above the piston 7 than to the inow of the oilinto the space 15 under the piston, so that a braking action is producedand shortly before the piston 7 reaches its lowest pasition the spring10 will screw 12 and there y almost completely close the ball valve 11,so that. the descending piston 7 will be more strongly braked shortlybefore its dead centre, that is shortly before the door lock snaps to.When the braking action is to be made entirely inefiective through aconsiderable angle, the plug 29 on the square part 28 is removed and thepiston rod is turned (in the present example throu h so that thecross-bar will occupy t e position indicated by 25 in Figure 7, which ismade possible by the horizontally extending grooves 811. The plug 29 isthereu on replaced and screwed down ti htly. 8 opened through a out 90,the s ring 33 will be stressed duringthe whole 0 the opening angle, butthe piston will be raised only during the second half of the openingangle. In a corresponding manner the door is braked during the closingmotion until it has reached a closing angle of 45.

When this position is reached, the crossbar 25 leaves the helicalgrooves 8 and enters the horizontal grooves 811, that is to say thestrike the n the door being braking action already ceases at this positin and the, door, which is now only su ject to the force of the closingspring 33, is closed by the ring without being braked. The angle odisplacement of the cross-bar 25 with respect to the piston 7 depends onthe square part in the plug 29. In the present case a star shaped eightcornered hole is provided, but of course a twelve cornered hole might beused, which will allow of a displacement through 30. The displacementand the locking of the square part 28 in the plug 29 can also beefiected by other means, for instance b inserted pins and with a fineranlar su -division.

What I claim is-- A combined door hinge and check, comprising incombination a pair of leaves, a closing spring having its ends securedrespectively to said leaves, a fluid container associated with one ofsaid leaves, a nonrotatable brake piston slidable in said container andhaving alguldeways therein extendmg in part helic y and in part parallelto a plane normal to the longitudinal axis of the piston, a piston rodhaving a cross-bar thereon in engagement with said guideways,

a. closing cap secured on the other leaf, said closing cap and the endof the piston rod re- 7 'mote from the piston having mutually en--gaging securing means for adjustably se curing the said end of thepiston rod to-the second mentioned leaf with the cross-bar of the pistonrod in various angular positions with respect to the piston so as toenable the cut of the cross-bar with helic y extending part of the 'dewato 'take place at different peri of t ogening movement of the door, asand for t e purposes set forth. w In testimony whereof I have signed myname to this s ification. r

RIEDRIGH KREINER.

